retinal degeneration/phosphatase

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Identification and characterization of a conserved family of protein serine/threonine phosphatases homologous to Drosophila retinal degeneration C.

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The Drosophila retinal degeneration C (rdgC) gene encodes an unusual protein serine/threonine phosphatase in that it contains at least two EF-hand motifs at its carboxy terminus. By a combination of large-scale sequencing of human retina cDNA clones and searches of expressed sequence tag and genomic

Functional characterization of the three Drosophila retinal degeneration C (RDGC) protein phosphatase isoforms.

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Drosophila retinal degeneration C (RDGC) is the founding member of the PPEF family of protein phosphatases. RDGC mediates dephosphorylation of the visual pigment rhodopsin and the TRP ion channel. From the rdgC locus, three protein isoforms, termed RDGC-S, -M, and -L, with different N-termini are

A novel human serine-threonine phosphatase related to the Drosophila retinal degeneration C (rdgC) gene is selectively expressed in sensory neurons of neural crest origin.

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Through our transcriptional mapping effort in the Xp22 region, we have isolated by exon trapping a new transcript highly homologous to the Drosophila retinal degeneration C (rdgC) gene. rdgC encodes a serine/threonine phosphatase protein and is required in Drosophila to prevent light-induced retinal

Drosophila retinal degeneration C (rdgC) encodes a novel serine/threonine protein phosphatase.

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The Drosophila retinal degeneration C (rdgC) gene is required to prevent light-induced retinal degeneration. Molecular analysis shows that the rdgC transcription unit encodes a novel serine/threonine protein phosphatase. Amino acids 153-393 define a domain that has 30% identity with the catalytic

Deficiency of SHP-1 protein-tyrosine phosphatase in "viable motheaten" mice results in retinal degeneration.

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OBJECTIVE Viable motheaten mutant mice (abbreviated allele symbol me(v)) are deficient in Src-homology 2-domain phosphatase (SHP)-1, a critical negative regulator of signal transduction in hematopoietic cells. These mice exhibit immune dysfunction, hyperproliferation of myeloid cells, and

Molecular cloning, expression, and characterization of a novel human serine/threonine protein phosphatase, PP7, that is homologous to Drosophila retinal degeneration C gene product (rdgC).

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A novel serine/threonine protein phosphatase (PPase) designated PP7 was identified from cDNA produced from human retina RNA. PP7 has a molecular mass of approximately 75 kDa, and the deduced amino acid sequence of PP7 contains a phosphatase catalytic core domain that possesses all of the invariant

Inactivation of the Akt survival pathway during photoreceptor apoptosis in the retinal degeneration mouse.

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OBJECTIVE Previous work has indicated that the serine-threonine protein kinase Akt is a general mediator of cellular survival signals and that loss of Akt-mediated signaling can lead to the activation of apoptosis. This study was conducted to establish whether regulation of the Akt survival pathway

Solubility and subcellular localization of the three Drosophila RDGC phosphatase variants are determined by acylation.

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Protein phosphorylation is an abundant molecular switch that regulates a multitude of cellular processes. In contrast to other subfamilies of phosphoprotein phosphatases, the PPEF subfamily is only poorly investigated. Drosophila retinal degeneration C (RDGC) constitutes the founding member of the

Depletion of PtdIns(4,5)P₂ underlies retinal degeneration in Drosophila trp mutants.

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The prototypical transient receptor potential (TRP) channel is the major light-sensitive, and Ca(2+)-permeable channel in the microvillar photoreceptors of Drosophila. TRP channels are activated following hydrolysis of phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P₂] by the key effector enzyme

Hereditary retinal degeneration in Drosophila melanogaster. A mutant defect associated with the phototransduction process.

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Two genes in Drosophila, rdgA and rdgB, which when defective cause retinal degeneration, were discovered by Hotta and Benzer (Hotta, Y., and S. Benzer. 1970. Proc. Natl, Acad. Sci. U. S, A. 67:1156-1163). These mutants have photoreceptor cells that are histologically normal upon eclosion but

Suppression of constant-light-induced blindness but not retinal degeneration by inhibition of the rhodopsin degradation pathway.

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BACKGROUND Continuous exposure to light, even at relatively low intensities, leads to retinal damage and blindness in wild-type animals. However, the molecular mechanisms underlying constant-light-induced blindness are poorly understood. It has been presumed that the visual impairment resulting from

Primary retinal degeneration: evidence of normal phagocytosis in the retinal pigment epithelium.

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In rats with primary retinal degeneration, lens extraction combined with total retinal detachment provided a model for injection of a tracer of colloidal carbon into the subretinal space. Electron microscopy and acid phosphatase cytochemistry were subsequently used to analyze the ingestion of tracer

A G protein-coupled receptor phosphatase required for rhodopsin function.

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Heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors are phosphorylated by kinases that mediate agonist-dependent receptor deactivation. Although many receptor kinases have been isolated, the corresponding phosphatases, necessary for restoring the ground state of the

Dependence on the Lazaro phosphatidic acid phosphatase for the maximum light response.

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The Drosophila phototransduction cascade serves as a paradigm for characterizing the regulation of sensory signaling and TRP channels in vivo . Activation of these channels requires phospholipase C (PLC) and may depend on subsequent production of diacylglycerol (DAG) and downstream metabolites . DAG

Regulation of the rhodopsin protein phosphatase, RDGC, through interaction with calmodulin.

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Hundreds of G protein-coupled receptors (GPCRs) and at least six GPCR kinases have been identified, but the only GPCR phosphatase that has been definitively demonstrated is the rhodopsin phosphatase encoded by the rdgC locus of Drosophila. Mutations in rdgC result in defects in termination of the

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